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RuO 2 Particles Anchored on Brush‐Like 3D Carbon Cloth Guide Homogenous Li/Na Nucleation Framework for Stable Li/Na Anode
Author(s) -
Ye Shufen,
Liu Fanfan,
Xu Rui,
Yao Yu,
Zhou Xuefeng,
Feng Yuezhan,
Cheng Xiaolong,
Yu Yan
Publication year - 2019
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201903725
Subject(s) - anode , nucleation , materials science , stripping (fiber) , gravimetric analysis , chemical engineering , alkali metal , lithium (medication) , carbon fibers , sodium , nanotechnology , composite material , electrode , chemistry , metallurgy , medicine , organic chemistry , composite number , engineering , endocrinology
Lithium (sodium)‐metal batteries are the most promising batteries for next‐generation electrical energy storage due to their high volumetric energy density and gravimetric energy density. However, their applications have been prevented by uncontrollable dendrite growth and large volume expansion during the stripping/plating process. To address this issue, the key strategy is to realize uniform lithium (sodium) deposition during the stripping/plating process. Herein, a thin lithiophilic layer consisting of RuO 2 particles anchored on brush‐like 3D carbon cloth (RuO 2 @CC) is prepared by a simple solution‐based method. After infusion of Li, the RuO 2 @CC transfers to Li‐Ru@CC. Ru nanoparticles not only play a role in leading Li + (Na + ) to plate on the 3D carbon framework, but also lower local current density because of the good electrical conductivity. Furthermore, density functional theory calculations demonstrate that Ru metal, the reaction product of alkali metal and Ru, can lead Li + to plate evenly around carbon fiber owing to the strong binding energy with Li + . The Li‐Ru@CC anode shows ultralong cycle life (1500 h at 5 mA cm −2 ). The full cell of Li‐Ru@CC|LiFePO 4 exhibits lower polarization (90% capacity retention after 650 cycles). In addition, sodium metal batteries based on Na‐Ru@CC anodes can achieve similar improvement.